Excessive use of cpu by svchost.exe

Operating Systems

I have a question might be wrong what I am asking but i have seen this with my system. Excessive use of cpu by svchost.exe
My svchost.exe has been using maximum CPU usage. I don't understand why is this happening?
What should I do in this case?

When you run Windows Update to scan for updates that use Windows Installer, including Office updates, you may experience a memory leak, or you may receive an error message for the Svchost process

The problem that the "Symptoms" section describes was corrected in Windows Update Agent 3.0 and in update 927891. These updates were distributed through Microsoft Update in June and July, 2007. If you are still experiencing a problem that resembles the one that this article describes, it may be a different problem.

These problems may occur when you try to scan for Microsoft Office updates. You may also experience these problems when you use any one of the following update mechanisms: